Sammy has a thing for stomping on her victims, already quite totally helpless in the vacbed, but she still needs to feel the power of her perfect feet, on my face, chest, neck, wherever they can do the most harm. All this, while she continues to play with my air supply, by turning an innocent looking valve, and giggling as she watches me squirm. She then starts fingering her clit while I struggle for a breath of air.